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Finding the Third Proportional to 331,311 and 720,618

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Solution

The third proportional to 331,311 and 720,618 is: 1,567,380.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,311 : 720,618 = 720,618 : x
  2. Step 2: Convert to fraction form
    331,311/720,618 = 720,618/x
  3. Step 3: Cross multiply
    331,311x = 720,618 × 720,618
  4. Step 4: Simplify right side
    331,311x = 519,290,301,924
  5. Step 5: Solve for x
    x = 519,290,301,924/331,311
  6. Step 6: Final answer
    x = 1,567,380.20

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.